src/mesa/vbo/vbo_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /* Author:
  26  *    Keith Whitwell <keithw@vmware.com>
  27  */
  28
  29 #include <stdbool.h>
  30 #include "main/arrayobj.h"
  31 #include "main/glheader.h"
  32 #include "main/bufferobj.h"
  33 #include "main/context.h"
  34 #include "main/imports.h"
  35 #include "main/macros.h"
  36 #include "main/light.h"
  37 #include "main/state.h"
  38 #include "main/varray.h"
  39 #include "util/bitscan.h"
  40
  41 #include "vbo_private.h"
  42
  43
  44 static void
  45 copy_vao(struct gl_context *ctx, const struct gl_vertex_array_object *vao,
  46          GLbitfield mask, GLbitfield state, int shift, fi_type **data)
  47 {
  48    struct vbo_context *vbo = vbo_context(ctx);
  49
  50    mask &= vao->_Enabled;
  51    while (mask) {
  52       const int i = u_bit_scan(&mask);
  53       const struct gl_array_attributes *attrib = &vao->VertexAttrib[i];
  54       struct gl_array_attributes *currval = &vbo->current[shift + i];
  55       const GLubyte size = attrib->Size;
  56       const GLenum16 type = attrib->Type;
  57       fi_type tmp[8];
  58       int dmul = 1;
  59
  60       if (type == GL_DOUBLE ||
  61           type == GL_UNSIGNED_INT64_ARB)
  62          dmul = 2;
  63
  64       if (dmul == 2)
  65          memcpy(tmp, *data, size * dmul * sizeof(GLfloat));
  66       else
  67          COPY_CLEAN_4V_TYPE_AS_UNION(tmp, size, *data, type);
  68
  69       if (type != currval->Type ||
  70           memcmp(currval->Ptr, tmp, 4 * sizeof(GLfloat) * dmul) != 0) {
  71          memcpy((fi_type*)currval->Ptr, tmp, 4 * sizeof(GLfloat) * dmul);
  72
  73          currval->Size = size;
  74          currval->_ElementSize = size * sizeof(GLfloat) * dmul;
  75          currval->Type = type;
  76          currval->Integer = vbo_attrtype_to_integer_flag(type);
  77          currval->Doubles = vbo_attrtype_to_double_flag(type);
  78          currval->Normalized = GL_FALSE;
  79          currval->Format = GL_RGBA;
  80
  81          ctx->NewState |= state;
  82       }
  83
  84       *data += size;
  85    }
  86 }
  87
  88 /**
  89  * After playback, copy everything but the position from the
  90  * last vertex to the saved state
  91  */
  92 static void
  93 playback_copy_to_current(struct gl_context *ctx,
  94                          const struct vbo_save_vertex_list *node)
  95 {
  96    if (!node->current_data)
  97       return;
  98
  99    fi_type *data = node->current_data;
 100    /* Copy conventional attribs and generics except pos */
 101    copy_vao(ctx, node->VAO[VP_MODE_SHADER], ~VERT_BIT_POS & VERT_BIT_ALL,
 102             _NEW_CURRENT_ATTRIB, 0, &data);
 103    /* Copy materials */
 104    copy_vao(ctx, node->VAO[VP_MODE_FF], VERT_BIT_MAT_ALL,
 105             _NEW_CURRENT_ATTRIB | _NEW_LIGHT, VBO_MATERIAL_SHIFT, &data);
 106
 107    /* Colormaterial -- this kindof sucks.
 108     */
 109    if (ctx->Light.ColorMaterialEnabled) {
 110       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 111    }
 112
 113    /* CurrentExecPrimitive
 114     */
 115    if (node->prim_count) {
 116       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 117       if (prim->end)
 118          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 119       else
 120          ctx->Driver.CurrentExecPrimitive = prim->mode;
 121    }
 122 }
 123
 124
 125
 126 /**
 127  * Set the appropriate VAO to draw.
 128  */
 129 static void
 130 bind_vertex_list(struct gl_context *ctx,
 131                  const struct vbo_save_vertex_list *node)
 132 {
 133    const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
 134    _mesa_set_draw_vao(ctx, node->VAO[mode], _vbo_get_vao_filter(mode));
 135 }
 136
 137
 138 static void
 139 loopback_vertex_list(struct gl_context *ctx,
 140                      const struct vbo_save_vertex_list *list)
 141 {
 142    struct gl_buffer_object *bo = list->VAO[0]->BufferBinding[0].BufferObj;
 143    ctx->Driver.MapBufferRange(ctx, 0, bo->Size, GL_MAP_READ_BIT, /* ? */
 144                               bo, MAP_INTERNAL);
 145
 146    /* Note that the range of referenced vertices must be mapped already */
 147    _vbo_loopback_vertex_list(ctx, list);
 148
 149    ctx->Driver.UnmapBuffer(ctx, bo, MAP_INTERNAL);
 150 }
 151
 152
 153 /**
 154  * Execute the buffer and save copied verts.
 155  * This is called from the display list code when executing
 156  * a drawing command.
 157  */
 158 void
 159 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 160 {
 161    const struct vbo_save_vertex_list *node =
 162       (const struct vbo_save_vertex_list *) data;
 163    struct vbo_context *vbo = vbo_context(ctx);
 164    struct vbo_save_context *save = &vbo->save;
 165    GLboolean remap_vertex_store = GL_FALSE;
 166
 167    if (save->vertex_store && save->vertex_store->buffer_map) {
 168       /* The vertex store is currently mapped but we're about to replay
 169        * a display list.  This can happen when a nested display list is
 170        * being build with GL_COMPILE_AND_EXECUTE.
 171        * We never want to have mapped vertex buffers when we're drawing.
 172        * Unmap the vertex store, execute the list, then remap the vertex
 173        * store.
 174        */
 175       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 176       remap_vertex_store = GL_TRUE;
 177    }
 178
 179    FLUSH_FOR_DRAW(ctx);
 180
 181    if (node->prim_count > 0) {
 182
 183       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 184          /* Error: we're about to begin a new primitive but we're already
 185           * inside a glBegin/End pair.
 186           */
 187          _mesa_error(ctx, GL_INVALID_OPERATION,
 188                      "draw operation inside glBegin/End");
 189          goto end;
 190       }
 191       else if (save->replay_flags) {
 192          /* Various degenerate cases: translate into immediate mode
 193           * calls rather than trying to execute in place.
 194           */
 195          loopback_vertex_list(ctx, node);
 196
 197          goto end;
 198       }
 199
 200       bind_vertex_list(ctx, node);
 201
 202       /* Need that at least one time. */
 203       if (ctx->NewState)
 204          _mesa_update_state(ctx);
 205
 206       /* XXX also need to check if shader enabled, but invalid */
 207       if ((ctx->VertexProgram.Enabled &&
 208            !_mesa_arb_vertex_program_enabled(ctx)) ||
 209           (ctx->FragmentProgram.Enabled &&
 210            !_mesa_arb_fragment_program_enabled(ctx))) {
 211          _mesa_error(ctx, GL_INVALID_OPERATION,
 212                      "glBegin (invalid vertex/fragment program)");
 213          return;
 214       }
 215
 216       assert(ctx->NewState == 0);
 217
 218       if (node->vertex_count > 0) {
 219          GLuint min_index = _vbo_save_get_min_index(node);
 220          GLuint max_index = _vbo_save_get_max_index(node);
 221          ctx->Driver.Draw(ctx, node->prims, node->prim_count, NULL, GL_TRUE,
 222                           min_index, max_index, NULL, 0, NULL);
 223       }
 224    }
 225
 226    /* Copy to current?
 227     */
 228    playback_copy_to_current(ctx, node);
 229
 230 end:
 231    if (remap_vertex_store) {
 232       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 233    }
 234 }